Material-handling machine



June 24, 1930. A. w. RYBECK 1,765,450v

MATERIAL HANDLING MACHINE Filed DGO. '7, 1927 2 Sheets-Sheet l ana/@Jim June 24, 1930. A, w RYBECK MATERIAL HANDLING MACHINE Filed Dec. 7, 1927 2 Sheets-Shea?l 2 Patented June 24, 1930 UNITED armar renc ii,

ADOLPH W. RYVBECK, OF MILWAUKEE, WISCONSIN, ASSIGNOR TO T. L. SMITH COI/IP ANY', 0F 'MILWAUKEE WISCONSIN, .A CORPORATION OIE.l WISCONSIN e Marianna-HANDLING MACHINE Application led December 7, 192.7. Serial No. 238,323. i

This invention relates to certain new and' particularly with concrete mixers of smaller capacities, wherein the chute is manually operated to and from its operative position, inrproviding means whereby the chute may be quickly and easily manipulated, and this invention has as an object the provision of improved chute operating means whereby the same ,may be readily manipulated with the exertion of a minimumof energy.` v

A more specific object of this invention resides in the provision ofan improved arrangement of levers whereby the chute is quickly operated with a minimum of energy and in which the mechanical advantage increases proportionally as the chute receiving end is moved into the path of the batch within the drum. n

And a still further object of this 4invention resides in the provision of an improved n appliance of the character described which is of very simple construction thus increasing its reliability and eliminating the neces-` sity of frequent repairs and which may be readily applied to machines at the time of manufacture or tothe machines now in use,

With the above and other vobjects in view which will appear as the description proceeds, my invention resides in the novel con-y struction, combination and arrangement of parts. substantially as hereinafter described and more particularly defined by the appended claims, it being understood that such changes in the precise embodiment of the herein disclosed invention may be made as come within the scope of the claims.

In the accompanying drawings, I have il# lustrated'one complete example of the physical embodiment of my invention constructed' according to the best mode I have so far de` vised `for 'the practical application of the principles thereof, andv in which: Y

Figure l is a side, elevational view of a' material mixing machine equipped with a chute operating means embodying my inven-V tion; v

Figure 2 is a view, partly in section and partly in elevation, takenfthrough F igurel on the plane of the line 2'2; I

Figure 3 is a fragmentary, side elevational view, with parts broken away, on the plane of the line 3 3 of F igureQ; and

Figure 4 is a view, partly in section and.

partly in elevation, taken through: Figure 2 on the plane of the line l-L Referring now more particularly to the accompanying drawings, inwhich like numerals designate like parts throughout the several views, 5 designates a concrete mixing machine of conventional construction having a suitable frame structure including up` rights and braces 6 of angle iron or other structure, and 7 a mixing drum vrotatably mounted within the frame and adapted to have inaterialsfed thereto by a loadingskip or other means 8 which are discharged therefrom after they have become thoroughly mixed, by means of a chute 9. The chute is preferably of channel or trough shape oarried by a medial bracket or arm l0 prefer` ably of arcuate shape with its upper end fixed to a shaft l1 journaled in bearings l2` fixedvto certain of the forward supports 6.' rlhe chute normallyreposesin the yposition illustratedy in Figures land 8 with its' outer dischargeend 9. elevated and its inner receiving end 9y downward and just inwardly of the drum discharge opening, not shown,

so that the same` is out of the path of the batch which is being mixed. v. When it is desired to discharge a batch from the drum, the chute is swung in a coun-y ternclockwise direction with respect to Fig#k ures l and 3, elevating and I shifting its Yreceivingv end into the drum to intercept the batch so that it falls into the chute andis discharged either directly oii the ground, or into viii)l suitable receptacles placed under the chute discharge end 9. Heretofore, the chute has been manipulated by means of a lever fixed to the shaft and operated directly from a crank fixed to an operating shaft, and diiiiculty has been experienced withsuch a construction due to the force required to swing the chute receiving end into the path of the batch within the drum, as the batch, in addition toits great weight, has added thereto the force imparted by its being thrown about within the drum, as will be apparent. The structure now about to be described assures the quick movement of the Vchute to either of its positions with a minimum of energy and at theV same time compacts the mechanism within a small area so as not tovbe cumbersome. Y y

The shaft 11 has one end ex ended beyond one bearing 12 to which one end of a crank arm or lever 13 is keyed or otherwise fixed, a

link 14 having one end pivoted to the outer end of the lever, as at 15, and its other end pivotally connected with a lateral projection or ,lug 16 of a lever 17, as at 18. The lever 17 is swingingly mounted on a shaft 19 supported in a bearing bracket structure 2O secured to the uprights by a suitable channel beam 21. Also formed on the outer end of the lever 17 and directed laterally in a direction opposite to the projection 16, is a projection 22 to which one end of a link 23 is pivoted, as at 24, to the outer end of which is p'ivoted, as at 25, to the outer end of a crank or lever 26 having its inner end` fixed to a shaft 27 journaled in the 'bearing portion 28 at the outer end of the bracket 20, the shaft 27 having a large bevel gear 29 fixed thereto with which a pinion 30, fixed on a shaft 31, meshes. The shaft 31 may be either power or manually operated and is preferably journaled in bearings 32 supported Afrom the framework of the mixer and'in the present instance its forward end extends beyond the framework to receiveV a suitable operating wheel 33.,

When the chute 9 is in its inoperative position illustrated in Figures 1 and 3, its weight normally tends to swing theA same downwardly to extendl its receiving end into the'path of the batchV within the drum, vbut it is held in check as the end of link 14 connected with the lever 17 is positioned beyond a line drawn through the Vcenters of the pivots 15 and 19 so that upward movement ofthe outer end of the lever 17 is consequently checked. However, when it is desired to move the chute to its operative position indicated by the full lines in Figure 4, shaft' 31 is rotated by the hand wheel or other means 3B in a direction to impart a .counterclockwise rotation to the beveled gear 29, and consequently the shaft 27. As a result, the outer end of the' crank lever 26-moves to the right and upwardly with respect tovFigure 3, swinging the lever 17 on Vits pivot in a corresponding direction and moving the link 14 beyond its center at which time the weight of the chute assists in its movement to reduce the amount of energy necessary to rotate the shaft 31 at the point the mechanical advantage of the leverage of the drive is at a minimum.

As the chute approaches the intermediate dotted line position illustrated in Figure 4, its end 9 intercepts the batch within the drum 7 and applies the maximum load by reason of the weight of the batch accumulating thereon and the momentum of its fall, and as the chute reaches this position, the mechanical advantage of the leverage has increased to nearly its maximum, as shown by the dotted lines in Figure 4, the lever 26 has at that point a straight lift on the lever 13.

As the shaft 31 continues to be rotated, thek chute and the levers continue on to their full line positions illustrated in Figure 4, the mechanical advantage of the leverage steadily increasing almost up to the end of the movement which is a few degrees further than the position depicted by the full lines of Figure 4,y and when the end of movement has been reached the center of pivot 18 will have passed beyond `an imaginary line drawn through the centers 19 and 15, locking the parts in discharging position.

Thus it will beV apparent that the arrangement of the leverage is such that the chute is locked in bot-h positions, that a great lifting force is obtained from a device compactedv within a small area and that an increased etticiency in the' operation is accomplished.

TWhat l claim as my invention is: 1. 1n a material mixing machine including a discharge chute and means mounting the same for movement from an ingperative y position with its receiving end lowermost, said chute tending to move by gravity to elevate and shift its receiving end inwardly, means for swinging the chute from its inoperative position to an operative position with its receiving end uppermost and inward Vof a line extending 'vertically from its position when inoperative, said means including a lever having one end connected with the chute, a second lever pivotally mounted at its innerl end, a link pivotally connecting the outer ends of the levers, a driven shaft,'a crank connected with the shaft, Vand a link connecting the outer end of the .crank and the outer end of the second lever, whereby the crank swings an operative position with its receiving end uppermost and inward of a line extending medially from its position when inoperative, said means including a lever having one end connected with the chute, a second lever pivotally mounted at its inner end, a link pivot` ally connecting the outer ends of the levers, a driven shaft, a crank connected with the shaft, a link connecting the outer end of the crank with the second lever, and means for rotating the shaft whereby the crank swings the second lever on its pivot which in turn swings the first lever through its connection therewith to move the chute from one position to another, said first-mentioned link passing beyond a dead center of the pivot of the second lever as the chute reaches its inoperative position whereby movement of the chute by gravity to an intermediate position is prevented.

3. In a material mixing machine having a discharge chute movable to and from operative position, means for moving the chute and including a lever having one end connected with the chute, a second pivotally mounted lever, a link connecting the free ends of the le-A vers, a driven shaft, an arm movable with the shaft, a second link connecting the arm with the second lever, and means for rotating the shaft whereby the arm swings the second lever on its pivot which in turn swings the first lever through its connection therewith to' move the chute from one position to another, the connection between the first mentioned link and the second lever passing beyond a dead center of the pivot of said second lever as the chute reaches either limit of movement to prevent movement of the chute by gravity.

4. In a material mixing machine, means for moving the chute from one position to the other and including a member fixed with respect to the chute, a pivotally mounted lever, a link connecting said member and the pivotally mounted lever, an actuating member, and a second link connecting the actuating member with the pivotally mounted lever adjacent its connection with the first mentioned link, whereby movement of the lactuating member rocks the pivotally mounted lever to move the chute from one position to the other, the connection or" the first mentioned linkl with the pivotally mounted lever passing beyond dead center at both limits of movement of the chute to releasably secure the same in such position.

In testimony whereof I have hereunto affixed my signature.

ADOLPH W. RYBECK. 

